As long as the beam pattern is within spec,then it will pass the mot requirement.You could try some toothpaste carefully rubbed over the affected area,but the issue may be inside the lens,in which case nothing will fix it.

Many abrasive products recommended here

Toothpaste is the least abrasive and if headlight not too bad MAY do the trick

Thereafter things like duraglit, brasso or rubbing compound MAY do the trick (with elbow grease) - try a sample area on the headlight unit

If really bad then it's 1000 grit sandpaper followed by 2000 grit followed by 3000 grit possibly followed by rubbing compound

HOWEVER after any of the abrasive solutions above - finish with a layer of proper car wax (and thereafter after every wash) as any remaining UV protection (if any!) will have been stripped off and the headlight unit will have lots of fine "scratches"

Edited by Big John on 31/05/2017 at 22:43